| Affiliation: | 1. Department of Gastroenterology and Gastrointestinal Oncology, National Cancer Center Hospital East, Kashiwa, Chiba, Japan;2. Division of Pathology, Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, Kashiwa, Chiba, Japan;3. Department of Medical Oncology, Graduate School of Medicine, Chiba University, Chuo‐ku, Chiba, Japan;4. Department of Esophageal Surgery, National Cancer Center Hospital East, Kashiwa, Chiba, Japan;5. Department of Digestive Endoscopy, National Cancer Center Hospital East, Kashiwa, Chiba, Japan;6. Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, Kashiwa, Chiba, Japan |
